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Home >> Buick >> 2015 >> Regal GS, AWD >> Repair and Diagnosis >> Engine Performance >> Testing & Diagnosis >> Engine Controls And Fuel - 2.0L (LTG) - DTC P0010 To DTC P0333 >> Diagnostic Information and Procedures >> DTC P00F4-P00F6: Intake Air Humidity Sensor >> Circuit/System Verification

Circuit/System Verification

NOTE:

To minimize the effects of residual engine heat and sensor internal heating elements, perform Steps 1 and 2 of this verification procedure only if the ignition has been OFF for 8 hours or more.

  1. Ignition ON.
  2. Verify the following scan tool parameters are within 30°C (54°F) of each other.
    • Start-Up IAT Sensor 1
    • IAT Sensor 2
    • IAT Sensor 3; where equipped
    • If not within 30°C (54°F) 

      Refer to Circuit/System Testing.

    • If within 30°C (54°F) 
  3. Engine idling, verify the scan tool Intake Air Humidity parameter is between 5 and 90%.
    • If not between 5 and 90% 

      Refer to Circuit/System Testing.

    • If between 5 and 90% 
  4. Operate the vehicle within the conditions for running the DTC. You may also operate the vehicle within the conditions that you observed from the freeze frame/failure records data.
  5. Verify the DTC does not set.
    • If the DTC sets 

      Refer to Circuit/System Testing.

    • If the DTC does not set 
  6. All OK
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